Shaped structures composed of aromatic copolyamides and production thereof

摘要

The invention concerns filaments, fibres, pulp, films and sheets composed of a copolyamide which has at least the recurring structural units of the formulae <IMAGE> and in which the proportions of the diamine components B, C and D relative to the total amount of diamine components in mol % are within a predetermined range. Such copolyamides can be produced from the corresponding diamines and dicarbonyl dichlorides in aprotic solvents in the presence or absence of metal halides of the first or second group of the periodic table. The obtainable spinning solutions can be further processed in known manner to produce the shaped structures claimed.